






🔥 Power your micro build with ASUS Prime B450M-A — where speed meets stability!
The ASUS Prime B450M-A/CSM is a microATX motherboard designed for 2nd generation AMD Ryzen processors, delivering robust performance with DDR4 memory support, NVMe M.2 storage, USB 3.1 Gen2 connectivity, and Gigabit LAN. It features 5X Protection III for hardware durability, Aura Sync RGB headers for customizable lighting, and legacy COM/PS2 ports, making it a versatile and reliable choice for professional-grade compact PC builds.

| ASIN | B07FKV5HWJ |
| Best Sellers Rank | #2,002 in Computer Motherboards |
| Brand | ASUS |
| Built-In Media | Motherboard |
| CPU Socket | Socket AM4 |
| Chipset Family | AMD B450 |
| Chipset Type | AMD B450 |
| Compatible Devices | Personal Computer |
| Compatible Processors | AMD 1st Gerenration Ryzen , AMD 2nd Gerenration Ryzen |
| Customer Reviews | 4.6 out of 5 stars 3,613 Reviews |
| Global Trade Identification Number | 00192876078808 |
| Graphics Card Interface | PCI Express |
| Item Dimensions L x W x H | 9.5"L x 2"W x 9.6"H |
| Item Type Name | Asus Prime B450M-A/CSM AMD AM4 (3rd/2nd/1st Gen Ryzen™) Micro-ATX commercial motherboard (1Gb LAN, ECC Memory, D-Sub/HDMI/DVI-D, TPM header, COM port, ASUS Control Center Express) |
| Item Weight | 1.5 pounds |
| Main Power Connector Type | 24-Pin |
| Manufacturer | ASUS Computer International Direct |
| Memory Clock Speed | 2400 MHz |
| Memory Slots Available | 4 |
| Memory Storage Capacity | 1 GB |
| Mfr Part Number | PRIME B450M-A/CSM |
| Model Name | B450M-A/CSM |
| Model Number | PRIME B450M-A/CSM |
| Number of Ethernet Ports | 1 |
| Number of Items | 1 |
| Number of Ports | 3 |
| Platform | Windows 10 |
| Processor Socket | Socket AM4 |
| RAM Memory Technology | DDR4 |
| Ram Memory Maximum Size | 1 GB |
| S/PDIF Connector Type | Optical |
| System Bus Standard Supported | SATA 3 |
| Total Number of HDMI Ports | 1 |
| Total PCIe Ports | 2 |
| Total SATA Ports | 4 |
| UPC | 192876078808 |
| USB 2.0 | 2 |
| Unit Count | 1 Count |
| Warranty Description | 3 Year Warranty |
M**L
Review specifically for Linux OS users using the Prime B450M-A and a Ryzen 3/5 3200G/3400G chip
First ever review for me, but felt others (Linux users) might want to know. This board provides good value and it does come (as another reviewer noted) with BIOS 1201. 1201 will let you boot up a Ryzen 3 or 5 3200G/3400G (know that these chips are actually based on last year's 11nm & thus not true 3000 cpu releases). But what non-users of ASUS motherboards might not be aware of or not know is that the BIOS EZ Flash 3 Utility provided by ASUS (inside the BIOS0 does not require an OS to update the BIOS. You ca actually update the motherboard without any hard drive/SSD/etc installed). Upon receiving this Prime B450M-A I immediately put it into a spare case I had lying around, put in a Ryzen 3 3400G I had picked up on Amazon sold for $88, used the provided AMD cooler it came with and it's pre-applied paste (unless you game 24-7, don't listen to the Net chatter about needing brand name, expensive thermal paste), then installed this ram - Crucial Ballistix Sport LT 3000 MHz DDR4 DRAM Desktop Gaming Memory Kit 16GB (8GBx2) CL15 BLS2K8G4D30AESCK (White) along with an totally empty non-formatted new Crucial120GB SSD I had lying around. This was all powered by a Corsair 400W PSU. Before doing anything OS-wise, I started the system up and hit "delete" to get into the BIOS. Using the ASUS EZ Flash Utility in the BIOS, which gives you the option of either using your own fat16/32 thumb drive (don't use any other format) or you can use the ethernet Internet connection the board already detects, I immediately updated the BIOS to ASUS' latest BIOS, 1820 (just yesterday I did it again & updated 1823). I then waited as the BIOS restarted itself, then stuck in an Ubuntu 18.04.3 ISO on a DVD (just choose your CD/DVD burner in the BIOS front page as your first boot choice) and hit delete again to get back into the BIOS. I chose my CD/DVD drive as my first boot choice on the first page of ASUS' excellent BIOS, and then it started up. Within several minutes, Ubuntu was completely installed on the SSD (this chip/memory/board is fast), the system rebooted, and I was staring at Ubuntu 18.04.3 where it made my 20" PC screen the "primary" while my 42" plasma TV was also picked up as the "secondary" screen. This is/was great, no messing with that, correct 1920x1080 resolutions too. Since the above (about 9-10 days), I have not had one crash or problem with the board running any version of Ubuntu from 18.04.3 & above. This computer system is in the living room where it gets heavy use by the family and kids for everything, from Netflix streaming, to multi-purpose PC uses, etc (I won't talk of this Ryzen 3 3200G's gaming performance, as it is already well-covered on the Net--at this price, for gaming, it simply rocks and, unbelievably to me, the included cooler handles things quite well--again, as long as the kids don't game 24-7, if that stats happening, which might as they see how fast this system is and what it can handle, I will get a bigger and better cooler to be safe). Also, here's what I found (over the past few days of testing) in terms of what will successfully boot Linux-wise on this Prime B450M-A motherboard using the latest AMD Ryzen 3 3200G chip mentioned above: (you'll notice as I list the successes and failures, the Linux OSes that come with Kernel 5 or above, they all boot up great; the others do not and you will have to perform some tricks and kernel installs to get things going if you use a Linux OS that doesn't come with kernel 5 or above): Successes: Ubuntu 18.04.3 LTS and all 19s 9I tried 19.10 too, worked great) Fedora 31 (Fedora actually seemed to be the fastest out of these 2 successes, but I stuck to Ubuntu for gaming reasons) Failed to boots: Debian 10.1 Linux Mint 19 (and version) MX-Linux 19 Opensuse LEAP & Tumbleweed etc, etc...(tried about 6 others, all failed because they don't have come with kernel 5 or above). Last thing I want to note is the latest BIOS updates come where ASUS (upon instructions) have disabled PCIe4. This "disabling of PCIe4" not ASUS's fault, this is AMD's. AMD is still not enabling PCIe4 on 300/400 series motherboards, and are instructing motherboard manufactuers (if they had enabled PCIe4) to disable PCIe4. AMD, if you know about the Pinnacle Ridge cpu clusterf#ck last year that they are still trying to be clear up completely, this board with the recently released Ryzen 3/5 3000 cpu(s) is a welcome change. ASUS did nothing wrong here. AMD is still saying they are not going to be releasing Linux-specific Ryzen drivers, which is kind of interesting since it was us Linux people who kept AMD afloat back in the dark days when it was thought Intel would crush them & drive them into insolvency. Sure hopes AMD rethinks things, and gets their act together over these next 4-9 months Linux-wise as the truly new 3000 cpus come out next summer. In sum, the ASUS Prime B450M-A board I tested here with a Ryzen 3 3200G cpu and 3000 MHZ DDR4 was a fun, hassle-free build. I also know this board will easily handle and provide a future upgrade path for AMD cpu(s) going forward over the next few years. Hope this review helps any other Linux users out there.
L**S
The To Go motherboard if you are starting on PC building.
Still to this day is pushing through with my AMD 3600 and it didn't gave a single problem. It looked great on my case and felt like it was well built and it handled my GPU a without any problems from the PCIE port. It's a bit lacking in the amount of USB ports, but with a good USB HUB, you can have some of those back. I had no problems with it while using windows 10, and I could without any problem do my assignments for college and play my games without any worries. If you are wondering if this motherboard can handle "Gaming" then you should be more than capable to game on it if you aren't looking for anything AAA from 2025 or onwards as the CPU's that accept aren't that strong for them. Other than that, like mentioned, it performed great.
A**N
Great Starter Mobo
This is a great starter mobo for anyone looking to build their first pc themselves. I have had nothing but good experiences with it. The features and specs are everything you can ask for and more for something in this price range. With 6 usb ports (4 usb 3.0 and 2 usb 3.1), pcei 4.0 support, amd gen 3 processor support, nvme m.2 support, and a boatload of uefi customization options, you really cant ask for a better option at under $80. If I had to complain about something, it would be the lack of water pump ports and internal usb ports for lighting. I recently had to run the rgb cord for my nzxt water pump to the outside of the case to an external usb port because the internal usb ports were taken by my network card (not optional) and my nzxt smart device v2 lighting controller (not optional either because it runs my case fans) so it would have been nice to have an option to plug more usb in internally without having to purchase a splitter. Overall though, you can't go wrong with this board. Just make sure you wont want to upgrade later. For those into upgrading, start with an ATX board because that has more options for expansion.
M**X
Overall, it's a pretty good motherboard for the money
I purchased this motherboard for my PC back in February. I waited until now to write a review to make sure everything would work properly for a prolonged period of time. Here are my thoughts on it. PORTS: For a Micro-atx motherboard, it has a decent amount of ports available. Particularly, the inclusion of 4 ram slots is uncommon with Micro-atx systems, but a welcome feature. Having another m.2 drive and built in Wifi would of been appreciated. But for ~$80, the exclusion of those features makes sense. INSTALLATION: The IO-Shield on this motherboard is difficult to install due to it having unnecessary prongs by many of the USB ports, but it's a minor issue overall. Cooler installation was easy with this motherboard with a Wraith stealth cooler and a Thermaltake Contac Silent cooler. Unfortunately dual-slot video cards will block one of the 1x PCIE slots, and installing a wifi card will take up the other slot. m.2 NVME speeds are fast, and installing Windows 10 was a breeze. OVERCLOCKING: I paired this motherboard with a Ryzen 5 2600. I overclocked it to 3.9Ghz at 1.2625v. This motherboard does not have VRM heatsinks, so it isn't best to push the voltages high on this motherboard. Overclocking is a little annoying with this motherboard because you have to apply voltages with a voltage offset instead of just applying a voltage value. It works, but it's just an extra step that isn't necessary. UPGRADING: If you want a motherboard that supports Ryzen 3000 well, this seems to be a good choice. Not only does it support Ryzen 3000, it also supports PCIE 4.0. It requires a Bios update in order to do so. You may need to get a loaner-kit from AMD in order to do so if you don't have a Ryzen 1000 or 2000 processor.
M**O
Delighted with my motherboard
This is a great accessory for my PC; I'm quite satisfied.
O**A
Solid Motherboard for my Ryzen 2600 !!
Nice piece of gear for my Micro build !! Nice fit into my Masterbox Q300L (no cd/dvd). Came with updated BIOS out of the box (yes, i checked the site). Put my Ryzen 2600 into mobo, worked first time at stock speed (3.4) with my G.Skill Ram and Seasonic PSU. Fine print: Ram worked out of the box. Plug and play. Mobo recognized ram at 2133, quick change in bios to 3.0 - no problems noted. Same with CPU. Fired up at 3.4. Quick bios change to 3.8 - low volts and solid. I'm not an overclocker so happy and easy. Finally, it stock fan is VERY QUIET and super easy install in my case. Finally, finally ... with no cd/dvd in case I opted for a USB Win 10 install. OMG - Never will use a Win 10 CD again. USB 3.0 is SUPER fast - even with HDD. Windows site very easy to make a Win 10 USB. Just need a good Win 10 code for final install. Really really finally - i HATE the LED, PWR switch case connector BS. C'mon ... this is 2018 FFS !! All n all. Easiest build ever. OBTW: like the case option to put HDD on the 'backside' of motherboard area vice an drive bay - much cleaner wiring, very solid, :) Pros: Solid construction, nice layout, arrived with updated BIOS. Cons: -mobo faceplate for case - meh. Not sure if it's the mobo or the case connector but could not get my front case USB 3.0 connector fully flush with the mobo. Works fine, just not a good physical fit, not flush with bottom of the connection - i think it's the case connector, not sure. Diagram on printed instructions for mobo - weak for case connectors / my old eyes. Good piece of gear !! Some specs: G.SKILL Aegis 8GB 288-Pin DDR4 SDRAM DDR4 3000 (PC4 24000) Memory (Desktop Memory) Model F4-3000C16S-8GISB ASUS GeForce GTX 1070 DUAL-GTX1070-O8G 8GB 256-Bit GDDR5 PCI Express 3.0 HDCP Ready SLI Support Video Card MasterBox Q300L mATX Case w/Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Air Flow Performance by Cooler Master Seasonic FOCUS 550 Gold SSR-550FM 550W 80+ Gold ATX12V & EPS12V Semi-Modular 7 Year Warranty Compact 140 mm Size Power Supply
J**N
Would Buy Again!
ASUS is a top brand known for solid build quality since I got into computers over 25 years ago. I bought this for a build for my dad (a school teacher), and I will buy it again, gladly, without hesitation for my next build(s). Since reliability is my first priority, I did not overclock the CPU. I did overclock the RAM to its rated speed of 3000 MHz, and this board did that flawlessly (always be sure to check the motherboard manufacturer's website for the memory compatibility list). This board worked perfectly out the box. There is a firmware update available, but it was not necessary at the time of build with a Ryzen 5 2400G CPU (ASIN B079D8FD28), 8 GB of Corsair Vengeance LPX 3000 MHz memory (ASIN: B0123ZBPDA), and an XPG SX8200 240 GB ADATA NVMe SSD (ASIN B07BLNFSQN). I did update the BIOS after everything was up and running, and that process was completely painless. Another reviewer commented that there was not good documentation for connecting the front panel connectors for things like the power switch, reset button, HDD indicator LED, etc. I suspect he did not look at the online resources available from ASUS. There is a manual in the box with the motherboard, and these is supplemental information available on the ASUS product support site. Unless I need high-end overclocking capabilities, integrated RGB LEDs, or some other feature this board explicitly lacks, this will be my go-to board for Ryzen based systems.
K**R
Outstanding
I have been using this motherboard for almost a week now and I must say that I am impressed. This is a replacement for a board from another company and a replacement for a dell computer that I paid $86 for(5 years ago). I love the speed that I get jumping around the internet. I am only limited by my internet service. Although I have not put a M.2 SSD drive in yet I am looking forward to the experience. Not sure which one to get any suggestions? I would like to have one at least 500gb. Installing this motherboard was a breeze. Its been over 10 years since I have built a computer from the ground up and things are a little different than it was back then...lol yes I am old. I am extremely happy with this motherboard and I will use ASUS again. My Build: (low budget) Motherboard: PRIME B450M-A CPU: Ryzen 3 2200g RAM: 16gb ddr4 GPU: GTX 1050 ti 4gb ddr5 video ram HDD: Seagate 500gbs PSU: Thermaltake 500w Buy this motherboard you won't be disappointed.
C**N
Funcional. Audio 7.1.
Esta bien, la ranura para M2/sata funciona y si, tengo el 7.1 configurado, para juegos y películas va bien. La tengo con un 2600x y una 1650 OC de gigabyte y de SSD un SATA pequeño en la mobo de WD green, una bestia de mobo para su costo. El audio es muy claro y para el costo bastante bueno -una tarjeta externa con 7.1 puede ser muy elevada en costo-
A**N
ddr4の延命に
ddr4の延命用
A**D
Worth it.
I'm not a person who likes to do reviews, But all you need to know is that this product is just as described, Nothing more, Nothing less.
A**D
ممتازه
ممتازه ,ولاكن للعلم لا تدعم المعالج المدمج مع CPU
B**E
Excellent value, works as advertised and very easy to set up
What I liked the best about this motherboard compared to similar offerings by other manufacturers were two key points: 1. The board is just a slight bit longer. That means that there are mounting holes past the memory modules to support them when you install memory. Other short boards leave this part 'floating' which isn't good. 2. Connecting those pesky front panel wires is always a pain. This board had a QR code in the manual that led to an on-line document that CLEARLY labelled all the pins and showed how to connect them. Bonus - the document also covered all the headers and jumpers CLEARLY. Finally, it just worked. First time. Perfectly. I have an Asus motherboard in my Intel I7 development machine and it too has been flawlesss for over 5 years now.
Trustpilot
3 weeks ago
3 weeks ago